Climate averages 1991–2020
Terni weather
in May.
A warm, moderately wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Terni: daytime highs average 22.9°C and nights cool to about 11.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 83 mm of rain on roughly 11 days, which makes May a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 35 min on an average May day.
The nearest other city in this atlas is Guidonia Montecelio (64 km away). In May its highs average 22.9°C, about as warm as Terni, with 77 mm of rain.
Among the 79 cities listed in Italy, Terni ranks joint 10th of 79 for the warmest May highs and joint 54th of 79 for the driest May (rainfall, lowest first). The mean May high of those 79 cities is 21.8°C; Terni is 1.1°C warmer than that mean.
From May to June, average highs rise by 4.9°C to 27.8°C, and monthly rainfall falls from 83 mm to 53 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Terni climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.5°C2.2°C | 2.2°C | 71 | 9.5 | 9.49 h |
| February | 11.6°C2.2°C | 2.2°C | 82 | 10.0 | 10.511 h |
| March | 15.0°C4.5°C | 4.5°C | 92 | 10.8 | 11.912 h |
| April | 18.4°C7.4°C | 7.4°C | 98 | 13.0 | 13.313 h |
| May, selected | 22.9°C11.4°C | 11.4°C | 83 | 11.3 | 14.615 h |
| June | 27.8°C15.5°C | 15.5°C | 53 | 8.7 | 15.215 h |
| July | 31.4°C18.5°C | 18.5°C | 30 | 5.7 | 15.015 h |
| August | 31.6°C19.0°C | 19.0°C | 33 | 6.1 | 13.914 h |
| September | 25.6°C15.0°C | 15.0°C | 81 | 9.4 | 12.513 h |
| October | 20.7°C11.5°C | 11.5°C | 105 | 10.5 | 11.111 h |
| November | 15.3°C7.2°C | 7.2°C | 129 | 12.4 | 9.810 h |
| December | 11.1°C3.2°C | 3.2°C | 107 | 10.7 | 9.19 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Guidonia Montecelio in MayItaly · 64 kmHigh 22.9°C · Low 11.5°C · 77 mm rain
- Perugia in MayItaly · 64 kmHigh 20.1°C · Low 9.3°C · 69 mm rain
- Rome in MayItaly · 75 kmHigh 22.3°C · Low 12.5°C · 58 mm rain
- Acilia-Castel Fusano-Ostia Antica in MayItaly · 93 kmHigh 20.8°C · Low 14.5°C · 40 mm rain
- Fiumicino in MayItaly · 94 kmHigh 20.6°C · Low 14.7°C · 40 mm rain
- Aprilia in MayItaly · 108 kmHigh 21.1°C · Low 13.5°C · 53 mm rain
- Arezzo in MayItaly · 118 kmHigh 21.5°C · Low 11.3°C · 74 mm rain
- Latina in MayItaly · 124 kmHigh 21.8°C · Low 13.4°C · 65 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Terni) is explained once on the Terni year overview and on the Sources, method and limits page.